NXT4556UPAZ

Translators, Level Shifters Overview

The NXT4556UPAZ is a SIM card interface level translator designed to connect a single low-voltage host microcontroller with a SIM card. It provides three dedicated level translators for converting data (IO), reset (RST), and clock (CLK) signals between the two interfaces. The device supports Class-B and Class-C SIM cards and operates with a SIM supply voltage range of 1.62 V to 3.3 V, while the host side operates from 1.08 V to 1.98 V. It complies with ETSI, IMT-2000, and ISO-7816 standards.

Translators, Level Shifters Feature Summary

• Automatic bidirectional level translation for I/O, RST, and CLK signals with capacitance isolation
• Integrated shutdown sequence compliant with ISO-7816-3 triggered by SIM power-down
• Built-in EMI filters to suppress digital I/O harmonics and reduce interference
• Robust electrostatic discharge protection on all SIM-side pins

Translators, Level Shifters Applications

• Mobile and personal phones
• Wireless modems
• SIM card terminals

Translators, Level Shifters Procurement Notes

Verify the specific suffix 'PAZ' against the official Nexperia ordering information table to confirm package type, temperature range, and marking code details. Ensure the selected variant matches the required WLCSP9 footprint and RoHS compliance status for your manufacturing process.

Translators, Level Shifters Selection Notes

Select this component when interfacing low-voltage hosts (1.08 V–1.98 V) with standard SIM voltages (1.62 V–3.3 V). It is suitable for designs requiring integrated pull-ups, EMI filtering, and automatic shutdown sequences without external resistors. Consider the WLCSP9 package size constraints for PCB layout.

Translators, Level Shifters Part Context

The NXT4556 series includes variants like the NXT4557GU which features an enable pin. The NXT4556UPAZ specifically utilizes a 9-pin wafer level chip-scale package (WLCSP9) with dimensions of 1.06 mm x 1.06 mm. It is part of Nexperia's portfolio for energy-efficient mobile communication solutions.

Translators, Level Shifters Replacement Considerations

Check for NXT4556UP or other suffixes in the same family if package availability differs. Verify functional equivalence regarding voltage ranges and shutdown behavior before substituting.